Scaptognathus oceanus Otto, 2000

Abé, Hiroshi, 2021, Taxonomic review of the subfamily Lohmannellinae (Acari: Trombidiformes Halacaridae) with morphological comparisons among genera, Zootaxa 4980 (2), pp. 201-255 : 232-233

Scaptognathus oceanus Otto, 2000

Diagnosis. Glp-1 posterior to Ds-1. Ds-2 on membranous cuticle. PE with 1 dorsal seta. GA tripartite in female. Female with 6 Pgs and 4 Sgs. Tr I–IV with 1-1-1-1 setae; Bf I–IV with 2-2-2-1 setae; Tf I–IV with 5-4-2-2 setae, 2-0-0-0 Bp setae; Gn I–IV with 4-5-3-3 setae, 2-1-0-0 Bp setae; Tb I–IV with 9-6-7-7 setae, 6-3-4-4 Bp setae; Ta I–IV with 1-1-0-0 Bp setae. Lc I with accessory process. Idiosoma length 190–202 in female. Ratio of gnathosoma to idiosoma 0.64.

Remarks. This species is similar to S. kunzi , S. sabularius , and S. tereninus . S. oceanus differs from the latter species in the ornamentation of the AD, the arrangement of the dorsal plates, and the position of Ds-2. Female is known.

Habitat. Sublittoral zone: Coarse sands at 5–15 m depth.

Distribution. South Pacific Ocean: Herald Cays (16°57.171’S, 149°12.036’E), (Queensland Plateau) [ Australia].

Reference. Otto (2000b).

Depository. QMS, ANIC, ZIZMH.